Hello,
Below is a simple patch to keyboard.c which gives voice output when renaming
files/directories or creating directories. Voice output has been added to
the following keys:
left, right, on+left, on+right and play.

I've only tested the patch on an fmr and have not looked into whether the
same logic would work on the player side. If anyone wishes to test this on
an fmr, I can send a prebuilt binary (.ajz file) privately.